Which of the following is not a scientific finding from studying underground ice in antarctica? a. increasing levels of lead since the industrial revolution b. that the smallest increases of lead correspond to the addition of lead to car fuel c. a signature of pollution caused by the atomic bomb tests of the 1950s and 1960s d. carbon particles created by forest fires in the tropics

The correct answer is B. The smallest increases of lead correspond to the addition of lead to car fuel.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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